277 Answered Questions for the topic astronomy
If a planet was located approximately 27 thousand light-years from the center of a galaxy and orbits that center once every 232 million years, how fast is the planet traveling around
If a planet was located approximately 27 thousand light-years from the center of a galaxy and orbits that center once every 232 million years, how fast is the planet traveling around the galaxy in... more
How long would it take to travel to an object 4.8 AU away at a constant speed of 340.0 km/hr?
Calculating our position in relation to the sun
Okay, I'm 63, and only went as far as precalculus in school, but that's probably enough to understand the answer. Here's my question:Imagine a line passing through the center of the sun and the... more
Kepler and Conservation of Energy
I need help wtih the following question:Consider the motion of a satellite with mass m around a planet with mass M (assume M>m). The orbit is elliptical.When the satellite is closest to the... more
Science about asteroids
Answer the following.1.Asteroids orbit the_____ _____ between Mars and Jupiter.2.explain what happens to a meteoroid in order for it to become a meteorite3.describe these parts of a comet: head,... more
Size of the Moon Question
Let’s say you were to do an experiment using a coin that helps to find the distance from earth to moon through measuring the distance between your eye and the moon with the coin. This will later... more
Pls help!! its an emergency i need help finding the answer.
In a scale model of the Solar System Earth is 1 inch in diameter. How far would you place Neptune from the Sun in the solar Scale Model? A. 895 meters B. 8.95 meters C. 8.950 kilometers
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What astronomer was the first to make very accurate estimates of the distance from the Sun to the known planets? A. Newton B. Copernicus C. Aristotle
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Which of the following can't be observed on the surface of Earth but can be viewed at high altitudes? A. x-rays B. Infrared light C. gamma rays
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Which of the following is not a consideration when choosing a site for an observatory A. How close it is to the Equator B. Temperature C. Light Pollution
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Which of the planets in the Solar System is the least dense? A. Saturn B. Jupiter C. Mercury
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Which of these telescopes are the most compact given the same size of the objective lens or mirror?A. newtonian reflector B. Schmidt Cassegrain C. all are of equal sizes
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To increase the magnification of an object through a telescope which of the following would you do or request? A. adjust the collimation of the telescope B. Get an eye piece with a shorter focal... more
Question about Gravity
J.M.JI understand that two objects pull upon each other with the same gravity, as the gravity equation gives one value for two masses: F = Gm1m2/r2 . However, it sounds absurd to say that a tennis... more
the escape speed
The escape speed from an object is v2 = 2GM/R, where M is the mass of the object, R is the object's starting radius, and G is the gravitational constant 6.67 × 10-11 m3 kg-1 s-2. What is the... more
What is the escape speed (in km/s) from an Earth-like planet with mass 4.9e+24 kg and radius 56.0 × 105 m? Use the gravitational constant G = 6.67 × 10-11 m3 kg-1 s-2.
Suppose a comet orbits the Sun every 68 years and has an eccentricity of 0.95. What is the length of its semi-major axis in AU?
newtons version on keplers third law
Newton’s version of Kepler’s third law is: P2 = 4 π2 / [G (M1 + M2)] × a3. The space shuttle orbits 271 km above the Earth's surface. How often do the astronauts see a sunrise (in minutes)?Use the... more
sam is an astronomer
Sam is an astronomer on planet Hua, which orbits the distant star Barnard. It has recently been accepted that Hua is spherical in shape, although its exact size is unknown. While studying in the... more
Suppose the Moon is 383 thousand km from Earth, and its orbital period is 27.2 days. What is the Moon's speed in km/hr for this orbit?
kinetic energy of moving object
The kinetic energy of a moving object is KE = 1/2 mv2, where m is the mass and v is the speed. An average apple has a mass of 0.19 kg. How fast must the apple travel in m/s to have kinetic energy... more
Suppose Halley's comet orbits the Sun every 74 years and has an eccentricity of 0.94. What is the perihelion distance of Halley’s comet in AU?
A Mercury-like planet has a semi-major axis of 0.397 AU has and an eccentricity of 0.23 What is the perihelion distance in AU?
If the sun was scaled down to the size of a tennis ball what is the scale factor?
Diameter of Sun: 1,390,000,000,000 cmDiameter of Tennis Ball: 6.86 cmWhat is the scale factor? Like is it 1 cm = 1 million cm etc